Software model process interaction

ABSTRACT

Methods and apparatus, including computer program products, for defining interactions between two process components. For each process component, at least one inbound operation and at least one outbound operation are defined. The inbound operations can be initiated by the other process component to read or modify data encapsulated in a business object solely associated with the process component. The outbound operations can read or modify data encapsulated in a business object solely associated with the other process component. Each of the process components characterizes software implementing a respective and distinct process, and each of the process components defines a respective at least one service interface for communicating and interacting with other process components. In addition, all communication and interaction between process components takes place through the respective interfaces of the process components.

BACKGROUND

The subject matter of this patent applications relates to modeling software systems, and more particularly to modeling the composition and interaction of components in a software system.

Enterprise software systems are generally large and complex. Such systems can require many different components, distributed across many different hardware platforms, possibly in several different geographical locations. Typical software modeling systems may not be able to reduce this complexity for end users. In order to design, configure, update or implement an enterprise software system, one is required to understand details of the system at varying levels, depending on his or her role in designing, managing or implementing the system. For example, a systems administrator may need a high-level technical understanding of how various software modules are installed on physical hardware, such as a server device or a network, and how those software modules interact with other software modules in the system. A person responsible for configuring the software may need a high-level functional understanding of the operations that each functional component provides. An application designer may need a low-level technical understanding of the various software interfaces that portions of the application require or implement. And an application developer may need a detailed understanding of the interfaces and functionality he or she is implementing in relation to the remainder of the system.

SUMMARY

Interactions between two process components are specified by defining, for each process component, at least one inbound operation and at least one outbound operation. The inbound operations can be initiated by the other process component to read or modify data encapsulated in a business object solely associated with the process component. The outbound operations can read or modify data encapsulated in a business object solely associated with the other process component. With this arrangement, each of the process components characterizes software implementing a respective and distinct process, and each of the process components defines a respective at least one service interface for communicating and interacting with other process components. In addition, all communication and interaction between process components takes place through the respective interfaces of the process components.

The outbound operation can be called after its associated business object is read or modified. After being called, the outbound operation can send a message.

One or more of the inbound operations can be a synchronous operation operable to receive a synchronous message generated by an external synchronous outbound operation defined by the other process component. One or more of the outbound operations can be an asynchronous outbound operation operable to generate an asynchronous message for receipt by an asynchronous inbound operation defined by the other process component.

The process components can also include process agents that characterize software to implement the inbound and/or outbound operations. Some of the process agents can handle only one inbound or outbound operation while other process agents can handle more than one such operation. In some variations, an interface can be defined to handle more than one inbound or outbound operation. In addition, the inbound operation can be operable to receive a message of a first type and convert it into a message of a second type.

The process components can be associated with different deployment units that each characterize independently operable software that can, in some variations, be deployed on separate platforms. Communications between process components in different deployment units can be message based. Communications between process components within the same deployment unit need not be message based, and in some cases, such communications can utilize shared memory, database records, and the like.

In an interrelated aspect, at least one inbound operation, at least one outbound operation, and at least one business object are defined for each of two process components. Each of the process components characterizes software implementing a respective and distinct process. In addition, each of the process components defines a respective at least one service interface for communicating and interacting with other process components, and all communication and interaction between process components takes place through the respective interfaces of the process components. The inbound operations are operable to start an execution of a step requested in an inbound message originating from the other process component by reading or modifying its respective business object. The outbound operations are called after their respective business object is modified or read and is operable to trigger a generation of an outgoing message requesting a step reading or modifying a business object associated with the other process component.

In a further interrelated aspect, a plurality of process agents are defined for two process components. Each process agent is either an inbound process agent or an outbound process agent. An inbound process agent is operable to receive a message from an inbound operation. An outbound process agent is operable to cause an outbound operation to send a message. Interactions are defined between at least one inbound process agent of a first process component and at least one outbound process agent of a second process component. Interactions are also defined between at least one inbound process agent of the second process component and at least one outbound process agent of the first process component. With this implementation, each of the process components characterizes software implementing a respective and distinct process, and each of the process components defines a respective at least one service interface for communicating and interacting with other process components. In addition, all communication and interaction between process components takes place through the respective interfaces of the process components.

Computer program products, which can be tangibly encoded on computer readable-material, are also described. Such computer program products can include executable instructions that cause a computer system to implement one or more of the acts and/or components described herein.

Similarly, computer systems are also described that can include a processor and a memory coupled to the processor. The memory can encode one or more programs that cause the processor to implement one or more of the acts and/or components described herein.

The subject matter described herein provides many advantages. A model provides modeling entities to represent aspects of a software system. Multiple views of the model are provided in a user interface. The model views offer varying levels of detail, allowing users to focus on the information that is important for their task. Model entities can be reused and correspond to reusable software that implements functionality corresponding to the model entity. The model supports dynamic mapping between incompatible message formats. A model can incorporate external components. The models can be used to generate metadata, which can be stored in a repository and used in various downstream processes and tools.

Moreover, the subject matter described herein provides a logical abstraction of how various software modules can interact to effect a business scenario. In particular, effective use can be made of process components as units of software reuse, to provide a design that can be implemented reliably in a cost effective way. Deployment units, each of which is deployable on a separate computer hardware platform independent of every other deployment unit, enable a scalable design. Furthermore, service interfaces of the process components can define a pair-wise interaction between pairs of process components that are in different deployment units in a scalable manner.

One implementation of the subject matter described in this specification provides all of the above advantages.

Details of one or more implementations of the subject matter described in this specification are set forth in the accompanying drawings and in the description below. Further features, aspects, and advantages of the subject matter will become apparent from the description, the drawings, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an illustration of a modeling method.

FIG. 2 is an illustration of a modeling system.

FIG. 3 is an illustration of process component modeling entities.

FIGS. 4A-4C illustrate a process interaction map.

FIG. 5 is an illustration of a process component model.

FIG. 6 is an illustration of a process component interaction model.

FIGS. 7A-7B illustrate a business object map.

FIG. 8 is an illustration of an integration scenario model entity.

FIG. 9 is an illustration of an integration scenario catalog.

FIGS. 10A-10B illustrate a GUI for presenting one or more graphical depictions of views of a model and modeling entities.

FIG. 11 is an illustration of process component interaction with an external process component.

FIG. 12 is an illustration of process component interaction through a mapping model element.

Like reference numbers and designations in the various drawings indicate like elements.

DETAILED DESCRIPTION

In the context of this document, a model is a representation of a software system, part of a software system, or an aspect of a software system. A model can be associated with one or more views. A view of a model represents a subset of the information in the model. For purposes of discussion, the term “model” will be used to refer to both a model or a view of the model. A modeling system can be used to create, modify and examine a model. A model can be used in a software development process to describe or specify a software application, or parts or aspects of a software application, for developers implementing or modifying the application. The model specifies the design to a useful level of detail or granularity. A compliant implementation of the modeled functionality will conform to the specification represented by the model.

FIG. 1 is a process flow diagram illustrating a method 100 of defining interactions between two process components. At 110, at least one inbound operation initiated by the other process component to read or modify data encapsulated in a business object solely associated with the process component is defined for each process component. At 120, at least one outbound operation to read or modify data encapsulated in a business object solely associated with the other process component is defined for each process component. With such an arrangement, each of the process components characterizes software implementing a respective and distinct process. In addition, each of the process components defines a respective at least one service interface for communicating and interacting with other process components so that all communication and interaction between process components takes place through the respective interfaces of the process components. At 130, one or more business objects are defined for each process component.

FIG. 2 illustrates a modeling system 200. An interactive graphical user interface (GUI) 204 allows a user to create, inspect and modify a model. The GUI 204 can present a model in different views offering differing levels of detail. This allows users to focus on information that is appropriate to their role or the task at hand. A model design component 206 coupled to the GUI 204 provides one or more tools for modifying and manipulating a model, as will be discussed below. A repository 202 is capable of storing one or more models and associated information. By way of illustration and without limitation, the repository can incorporate one or more files, databases, services, combinations of these, or other suitable means for providing persistent storage of model information.

FIG. 3 is an illustration of process component modeling entities (or “process components”) in a model. For brevity, where the sense is clear from the context, the term “process component” will be used to refer both to the modeling entity and to an implementation in a software system of a process represented by that modeling entity. The same dual use will be made of other terms to refer both to the modeling entity and an implementation represented by the entity, where the meaning is clear from the context.

A process component is a software package that realizes a business process and exposes its functionality as services. The functionality contains business transactions. A process component contains one or more semantically related business objects (e.g., 330, 310). A business object belongs to no more than one process component.

Process components are modular and context-independent. Context-independent means that a process component is not specific to a given integration scenario. (Integration scenarios are described later.) Therefore, process components are reusable, that is, they can be used in different integration scenarios.

A process component has one or more service interface modeling entities (316, 318, 320, 322, 336, 338) (or “interfaces”). An interface is a named grouping of one or more operations. It specifies offered (inbound service interface) or used (outbound service interface) functionality. While in general process components will have service interfaces, it is permissible to define a process component having no service operations. This would be appropriate, for example, for process components that inherently or by design interact only with process components deployed on the same hardware platform, in which circumstances a non-service method of interacting, e.g., through shared memory or database records, might be preferred.

An operation belongs to exactly one process component. A process component generally has multiple operations. An operation is the smallest, separately-callable function, described by a set of data types used as input, output, and fault parameters serving as a signature. An operation can use multiple message types for inbound, outbound, or error messages. An operation is specific to one interface, i.e., the same operation cannot be used in more than one interface.

Operations are described for purposes of exposition in terms of process agents. A process agent (or “agent”) is an optional modeling entity representing software that implements an operation. Operations can be implemented through other conventional techniques. Operations (and hence agents) can be synchronous or asynchronous, and inbound or outbound.

Synchronous outbound operations send synchronous request messages and process response messages. Synchronous inbound operations respond to messages from synchronous outbound operations. Synchronous communication is when a message is sent with the expectation that a response will be received promptly. Asynchronous communication comes with the expectation that a response will be provided by a separate operation invoked at a later point in time.

An asynchronous outbound operation is specific to a sending business object. If the asynchronous outbound operation is triggering a new communication to another process component, it is specific for the triggered process component. However, the same asynchronous outbound process operation can be used for two operations which are part of the same message choreography. If the asynchronous outbound operation is sending only a confirmation (not triggering), it might be re-used for different receiving process components.

Inbound operations are called after a message has been received. Based on a business object's status, inbound operations may initiate communication across deployment units, may initiate business-to-business (B2B) communication, or both by sending messages using well-defined services.

The model can describe the potential invocation by one process component of an operation on another process component. Graphically, this is depicted as an arc (340, 342) in FIG. 3 connecting the two process components 306 and 308. Invocation of an operation on a process component is always accomplished by another process component sending a message to the process component, if the two process components are part of different deployment units, which are described below. Interaction between two process components in the same deployment unit, on the other hand, can be implemented by the passing of messages, as described, or it can be implemented by the use of resources, e.g., data objects, database records, or memory, that are accessible to both process components when they are deployed.

Messages are described by message modeling entities (or “messages”) in the model.

An process agent can be associated with a single interface. For example, interface 338 is associated with process agent 332, interface 336 is associated with process agent 334, interface 316 is associated with process agent 312, and interface 318 is associated with process agent 314. In one variation, each operation is associated with a process agent.

An output operation generally responds to a change in a business object associated with the operation. The operation will generally perform some processing of the data of the business object instance whose change triggered the event. An outbound operation triggers subsequent business process steps by sending messages using well-defined outbound services to another process component, which generally will be in another deployment unit, or to a business partner. For example, outbound process agent 324 in process component 306 can invoke an operation of interface 322 to send a message that will be received by the inbound process agent 312 in process component 308. The message is routed to a specific operation in interface 316 according to the signature or type of the message, which the inbound process agent 312 handles.

Inbound process agents when implemented are pieces of software that are used for the inbound part of a message-based communication. An inbound process agent starts the execution of the business process step requested in a message by creating or updating one or multiple business object instances, e.g., for associated business objects (330, 310) in response to receiving a message. Outbound process agents when implemented can send messages in response to a business object changing or interaction with a business object. For example, the inbound process agent 312 may modify business object 310, thus triggering outbound process agent 314 to send a message to the inbound process agent 328. If two operation invocations are part of the same message choreography, they are associated with the same process agent.

A business object model entity models a business object. A business object is a representation of a type of a uniquely identifiable business entity (an object instance) described by a structural model and zero or more service interfaces. Implemented business processes operate on business objects.

A business object represents a specific view on some well-defined business content. A business object represents content, which a typical business user would expect and understand with little explanation. Business objects are further categorized as business process objects and master data objects. A master data object is an object that encapsulates master data (i.e., data that is valid for a period of time). A business process object, which is the kind of business object generally found in a process component, is an object that encapsulates transactional data (i.e., data that is valid for a point in time). The term business object will be used generically to refer to a business process object and a master data object, unless the context requires otherwise. Properly implemented, business objects are implemented free of redundancies.

Business process objects are associated with exactly one process component. Master data objects are either associated with exactly one process component or exactly one deployment unit.

Business objects residing in a foundation layer are called business foundation objects. The foundation layer is deployed on every platform, and its business objects, process components, and reuse services are available to be used by all application scenarios. It is assumed that business objects in the foundation layer will be local in all integration scenarios and can be directly accessed synchronously from business objects within deployment units in an application layer. Business objects in the foundation layer can be associated with more than one process component.

FIGS. 4A-4C illustrates a process interaction map 400. A process interaction map is a modeling entity that describes interactions between two or more process components. It can be presented in the GUI 204 (FIG. 2) by the model design component 206 as a circuit diagram, for example, with arcs indicating potential interactions between process components. In a visual rendition of the map 400, process components are represented as icons (e.g., 404, 406, 408). So called “external” process components are indicated with dashed lines (e.g., 406, 408). External process components are shown to place the modeled process components in their operational context relative to another system, e.g., a system belonging to another company, such as a customer or other third party. The GUI 204 allows a user to connect and disconnect process components (i.e., to indicate potential interactions), move process components, and zoom in a specific portion of the map 400 to see more detail, as indicated by view 414.

Groups of process components can be organized into scenarios and deployment units. An integration scenario modeling entity (or “scenario”) describes a group of process components that interact directly or indirectly (i.e., through one or more other process components) with each other. A process component belongs to one deployment unit. Scenarios are discussed below.

A deployment unit modeling entity (e.g., 402, 410, 412) models a deployment unit, which includes one or more process components that can be deployed together on a single computer system platform.

Separate deployment units can be deployed on separate physical computing systems and include one or more process components. For example, a physical system can be a cluster of computers having direct access to a common database. The process components of one deployment unit interact with those of another deployment unit only using messages passed through one or more data communication networks or other suitable communication channels. Thus, a deployment unit software entity deployed on a platform belonging to Company A can interact with a deployment unit software entity deployed on a separate platform belonging to Company B, allowing for business-to-business communication. Or deployment units in different divisions of the same company can interact with each other. More than one instance of a given deployment unit software entity can execute at the same time.

FIG. 5 is an illustration of a process component model (PCM) 500. A PCM is a view of a model that incorporates the model entities associated with a particular process component. A PCM can also describe potential interactions between a process component and other process components in the same or in different deployment units. For example, the illustrated process component 500 can interact with a Customer Requirement Processing component 504 and a Customer Invoice Processing component 525. Moreover, a PCM can describe interaction with external process components that are controlled by third parties (e.g., 528).

The PCM models operations incorporated in a process component. For example, inbound operation Change Sales Order based on Customer Requirement Fulfillment Confirmation 508, and outbound operations Request Invoicing 520 and Confirm Sales Order 522. The arc 530 connecting the process component 504 to the interface 502 represents that the process component 504 can invoke an operation on that interface. The arcs 532 and 534 represent that the process component illustrated in 500 can invoke an operation on process components 525 and 528, respectively.

The PCM optionally models process agents (e.g., 510, 516, 518) corresponding to the process component's operations. For example, the Change Sales Order based on Customer Requirement inbound process agent 510 models processing or responding to a message routed to inbound operations 508 or 540. The inbound process agent 510, for example, will access and modify the Sales Order business object 514 as part of the processing, e.g., change the delivery date of goods or services on the sales order.

Process component 525 can receive one or more messages by way of outbound operation 520, as denoted by the arc 532 connecting outbound operation 520 to the process component 525. Based on the change associated with the business object 514, the Request Invoicing from Sales Order to Customer Invoice Processing outbound process agent 518 invokes operation 520 in interface 526 to send a message to process component 525. Likewise, external process component 528 can receive one or more messages sent by outbound operation 522, as denoted by the arc 534 connecting operation 522 to the process component 528. Based on the state or a state change associated with the business object 514, outbound process agent 516 can invoke operation 522 to send a message to external process component 528.

FIG. 6 is an illustration of a process component interaction model (PCIM) 600. PCIMs can be reused in different integration scenarios. A PCIM is a view of a model that incorporates relevant model entities associated with potential interaction between two process components (e.g., 602, 604). Interfaces, process agents and business objects that are not relevant to the potential interaction are excluded. The PCIM 600 shows interactions between a Time and Labor Management process component 602 and a Goods and Service Acknowledgement process component 604.

The Time and Labor Management process component 602 includes an Employee Time Calendar business object 606 that gives a read-only information of a calendar based overview of different time data (e.g., Planned working time, an absences and working time confirmation) of employees and their superposition (e.g., illness, vacation, etc). The Employee Time Calendar business object 606 may use a Notify Goods and Services Acknowledgement outbound process agent 608 to invoke a Notify of Goods and Service Acknowledgement Notification operation 610 or a Notify of Goods and Service Acknowledgement Cancellation operation 612, which are both included in the Internal Service Acknowledgement Out interface 614. The Notify of Goods and Service Acknowledgement Notification operation 610 notifies the Goods and Service Acknowledgement process component 604 of a service provided by an external employee. The Notify of Goods and service Acknowledgement Notification operation 610 sends a Goods and Service Acknowledgement Request message 616 when an active employee time with Goods and Service Acknowledgement relevant information is created or changed.

The Goods and Service Acknowledgement process component 604 receives the Goods and Service Acknowledgement Request message 616 via an Internal Acknowledgement In interface 618. Upon receipt of the Goods and Service Acknowledgement Request message 616, a Create Goods and Service Acknowledgement operation 620 is invoked to create Goods and service Acknowledgement, and Time and Labor Management by initiating a Maintain GSA based on Internal Acknowledgment inbound process agent 622. The Maintain GSA based on Internal Acknowledgment inbound process agent 622 updates or creates a Goods and Service Acknowledgement business object 624 to report the receipt of goods and services. The Goods and Service Acknowledgement business object 624 may be used when employees of a company can confirm that they have received the goods and services they ordered through internal requests, purchasers, or designated recipients of goods and services, can confirm that they have received the goods and services they ordered on behalf of the employees for whom they are responsible, or suppliers or service providers can report that they have delivered the requested goods, or have rendered they requested services.

The Notify Goods and Services Acknowledgement outbound process agent 608 may also invoke the Notify of Goods and Service Acknowledgement Cancellation operation 612 to notify the Goods and Service Acknowledgement process component 604 of a cancellation of goods and service. The Notify of Goods and Service Acknowledgement Cancellation operation 612 sends a Goods and Service Acknowledgement Cancellation Request message 626 when an active employee time with Goods and Service Acknowledgement relevant information is cancelled. Upon receipt of the Goods and Service Acknowledgement Cancellation Request message 626, a Cancel Goods and Service Acknowledgement operation 628 is invoked to cancel Goods and service Acknowledgement. Next, the Maintain GSA based on Internal Acknowledgment inbound process agent 622 updates the Goods and Service Acknowledgement business object 624 to report the cancellation of goods and services.

The message format of a message sent by an outbound operation need not match the message format expected by an inbound operation. If the message formats do not match, and the message is transformed, or mapped. Message mapping is indicated by interposition of an intermediary mapping model element between the source and the destination of the message in a PCM or a PCIM (see below).

FIGS. 7A-7B illustrates a business object map 700. A business object map is a view of a model that incorporates deployment units, process components, and business objects. Interfaces, operations and process agents are excluded from the view. Each model entity is only represented once in the business object map. Hence, the business object map is a representation of all deployment units, process components, and business objects. In the illustrated business object map 700, and as shown in the highlighted portion 728, a Customer Invoice Processing process component 726 in Customer Invoicing deployment unit 704 incorporates two business objects: a customer invoice request 710 and a customer invoice 708. A Project Processing process component 724 in a Project Management deployment unit 706 includes five business objects: a Project Request 718, a Project 720, a Project Snapshot 712, a Project Simulation 714, and a Project Template 722.

FIG. 8 is an illustration of an integration scenario model entity 800 (or “integration scenario”). An integration scenario is a realization of a given end-to-end business scenario. It consists of the process components and the interactions between them, which are required for its realization. A process component is only represented once in an integration scenario model, even though the actual flow in the software system might invoke the same process component multiple times. An integration scenario model entity describes at a high level the potential interaction between process components in one or more deployment units that are relevant to realization of the business scenario. For example, an integration scenario can be a set of process components and their interactions working together to realize a business scenario to achieve a business objective, such as selling products to generate revenue. Internal details of process components are not described, nor are details of process component interactions (e.g., interfaces, operations and messages).

The illustrated integration scenario 800 is for a service procurement software application. The service procurement application is software that implements an end-to-end process used to procure services. The scenario 800 includes nine deployment units: a Financial Accounting unit 802, a Project Management unit 804, a Purchasing unit 806, a Supplier Invoicing unit 808, a Payment unit 810, a RFQ Processing unit 812, a Due Item Management unit 814, a Requisitioning unit 816, and a Human Capital Management unit 818.

The Financial Accounting deployment unit 802 includes an Accounting process component 803 that records all relevant business transactions.

The Project Management deployment unit 804 includes a Project Processing component 820 that is responsible for structuring, planning, and executing measures or projects (e.g., short-term measures, complex projects, etc).

The Purchasing deployment unit 806 includes four process components: a Purchase Request Processing process component 828, a Purchase Order Processing process component 830, a Purchasing Contract process component 832, and a Goods and Service Acknowledgement process component 833.

The Purchase Request Processing process component 828 provides a request or instruction to the purchasing department to purchase specified goods or services in specified quantities within a specified time.

The Purchase Order Processing process component 830 includes a purchase order business object and a purchase order confirmation business object. The purchase order is a request from a purchaser to an external supplier to deliver a specified quantity of goods, or perform a specified service within a specified time. The purchase order confirmation is a communication from a supplier to a purchaser to advise that a purchase order has been received. In particular, a purchase order confirmation may advise the purchaser of the supplier accepting the purchase order, or the supplier proposing changes to the purchase order, or the supplier not accepting the purchase order.

The Purchasing Contract process component 832 handles an agreement between a purchaser and a supplier that details the supply of goods or the performance of services at agreed conditions. The Purchasing Contract process component includes the purchasing contract business object.

The Goods and Service Acknowledgement 833 includes a Goods and Service Acknowledgement business object. The Goods and service Acknowledgement business object is a document that states the recipient's, for example, a purchaser's, obligation to pay the supplier for goods received or services rendered. An invoice is normally created after the goods and service acknowledgement has been confirmed.

The Supplier Invoicing deployment unit 808 includes a Supplier Invoice Processing process component 836. The Supplier Invoice Processing process component 836 includes a supplier invoice business object and a supplier invoice request business object. The supplier invoice is a document that states the recipient's obligation to pay the supplier for goods received or services rendered. The invoice may be created after the goods and service acknowledgment has been confirmed. The supplier invoice request is a document that is sent to invoice verification, advising that an invoice for specified quantities and prices is expected and may be created through evaluation settlement. The system uses the invoice request as a basis for invoice verification, as well as for the automatic creation of the invoice. The Payment deployment unit 810 includes a Payment Process component 838. The Payment Processing process component 838 is used to handle all incoming and outgoing payments as well as represent the main database for a liquidity status.

The RFQ deployment unit 812 includes an RFQ Processing process component 840. An RFQ Processing deployment unit includes a Request for Response business object and a quote business object. The request for quotation (RFQ) is a description of materials and services that purchasers use to request responses from potential suppliers. Requests for Quotation can be one of the following types: a request for (price) information, a request for quote that may run over a certain period of time, a request for proposal in complex purchasing situation or live auctions that may be performed over a short time frame. The quote is a response to a request for quotation in which a supplier offers to sell goods and services at a certain price. The quote can be subject to complex pricing and conditions.

The Due Item Management deployment unit 814 includes a Due Item Processing process component 842. The Due Item Processing process component 842 is used to manage all payables, receivables from service and supply and corresponding sales including a withholding tax.

The Requisitioning deployment unit 816 includes an Internal Request Processing process component 844. The Internal Request Processing deployment unit 816 includes an Internal Request business object. Employees of a company may make an internal request for the procurement of goods or services for the company. For example, the employees may order stationary, computer hardware, or removal services by creating an internal request. The internal request can be fulfilled by an issue of a purchase request to the purchasing department, a reservation of goods from stock, or a production request.

The Human Capital Management deployment unit 818 includes a Time and Labor Management process component 848. The Time and Labor Management process component 848 supports the definition of employees' planned working time as well as the recording or the actual working times and absences and their evaluation.

The foundation layer includes a Source of Supply Determination process component 834, a Customer Invoice Processing at Supplier process component 837, a Sales Order Processing at Supplier process component 846, a Payment Processing at Business Partner process component 850, a Bank statement creation at bank process component 852, and a Payment order processing at house bank process component 854.

The service procurement design includes a Source of Supply Determination process component 834 that uses two business objects to determine a source of supply: a supply quota arrangement business object, and a source of supply business object. A supply quota arrangement is a distribution of material requirements or goods to different sources of supply, business partners, or organizational units within a company. An example of the use of supply quota arrangements is the distribution of material requirements between in-house production and different sources for external procurement. A supply quota arrangement can also define the distribution of goods to customers in case of excess production or shortages. A source of supply is an object that describes a logical link between a possible source of products and a possible target.

A number of external process components, described below, will be used to describe the architectural design. These include a Customer Invoice Processing at Supplier process component 837, a Sales Order Processing at Supplier process component 846, a Payment Processing at Business Partner process component 850, a Bank statement creation at bank process component 852, and a Payment order processing at house bank process component 854.

The Supplier Invoicing deployment unit 808 receives messages from a Customer Invoice at Supplier processing component 837, which is used, at a supplier, to charge a customer for the delivery of goods or services.

The service procurement design includes a Sales Order Processing at Supplier process component 846 that may receive messages from the RFQ Processing process component 840. The Sales Order Processing at Supplier process component 846 handles customers' requests to a company for delivery of goods or services at a certain time. The requests are received by a sales area, which is then responsible for fulfilling the contract.

The Payment Processing at Business Partner process component 850, the Bank statement creation at bank process component 852, and the Payment order processing at house bank process component 854 may interact with the Payment Processing process component 838. The Payment Processing Process component 838 may send updates to a Payment Processing at Business Partner processing component 850, which is used to handle, at business partner, all incoming and outgoing payments and represent the main data base for the liquidity status. The Payment Processing Process component 838 also receives messages from the Bank statement creations at bank process component 852. The message may include a bank Statement for a bank account. The Payment Processing Process component 838 sends messages to the Payment order processing at house bank process component 854. The message may include a Bank Payment Order that is a Payment Order which will be sent to a house bank. The bank payment order may contain bank transfers as well as direct debits.

The connector 829 symbol is a graphical convention to improve graphical layout for human reading. A connector is a placeholder for another process component. For example, the connector 829 could be a placeholder for an Accounting process component.

FIGS. 9-9A illustrate an integration scenario catalog (or “scenario catalog”) 900. A scenario catalog presents an organized view of a collection of integration scenarios. The view can be organized in a number of ways, including hierarchically or associatively based on one or more attributes of the integration scenarios. The illustrated integration scenario catalog 900 represents a structured directory of integration scenarios. For example, a scenario directory Sell from Stock 902 representing a family of scenarios includes two entries: a reference to a Sell from Stock integration scenario 904, and a reference to a Sell from Stock for Delivery Schedules integration scenario 906.

FIGS. 10A-B illustrate the GUI 204 (from FIG. 2) for presenting one or more graphical depictions of views of a model and modeling entities. Each view can present a different level of detail or emphasize a different aspect of the model. This allows for different classes of users to focus on the information that is important for carrying out their duties without being distracted by extraneous detail. One or more of the following graphical depictions can be presented: a scenario catalog 1002, an integration scenario model 1004, a PCIM 1008, and a PCM 1010. In one variation, the GUI 204 allows a user to “drill down” to increasing levels of model detail. For example, selection of a scenario icon 1006 in the integration scenario catalog 1002 can cause an associated integration scenario model 1004 to be presented. Selection of a graphical representation of a process component 1014 in the integration scenario can cause an associated PCM 1010 for the process component to be presented. Likewise, selection of an arc 1012 connecting process components in different deployment units can cause a PCIM 1008 for the process components connected by the arc to be presented.

In one implementation, the aforementioned graphical depictions can be presented singularly or in combination with each other in the GUI 204. Moreover, a given graphical depiction can present all of its underlying information or a portion thereof, while allowing other portions to be viewed through a navigation mechanism, e.g., user selection of a graphical element, issuance of a command, or other suitable means.

Information can also be represented by colors in the display of model entities. For example, color can be used to distinguish types of business objects, types of process agents and types of interfaces.

FIG. 11 is an illustration of process component interaction with an external process component, representing an external system. As discussed earlier, a process component can interact with an external process component. This interaction can be modeled even though the interfaces of the external process are unknown, as is the case in this example. (However, if this information is known, it can be incorporated into the model.)

In this example, potential interactions are shown between a Purchase Order Processing process component 1102 and an external Sales Order Processing at Supplier process component 1104. The Purchase Order Processing process component 1102 includes a Purchase Order business object 1106 which is a request from a purchaser to an external supplier to deliver a specified quantity of goods, or perform a specified service, within a specified time. The Request Purchase Order to Supplier outbound process agent 1108 can request invocation of a Request Purchase Order Creation operation 1112, a Request Purchase Order Cancellation operation 1114, or a Request Purchase Order Change operation 1116 in an Ordering Out interface 1110.

The Request Purchase Order Cancellation operation 1114 requests a Cancellation of a Purchase Order that was formerly ordered at a supplier which creates a Purchase Order Cancellation Request message 1118. The Request Purchase Order Change operation 1116 requests a change of a purchase order that was formerly ordered at the supplier which creates a Purchase Order Change Request message 1120. The Request Purchase Order Creation operation 1112 requests a Purchase Order from a Supplier which creates a Purchase Order Request 1122.

Upon receiving a create, a change, or a cancellation message, the Sales Order Processing process component 1104 may create a Purchase Order Confirmation message 1123 to update the Purchase Order Processing component 1102. To complete the update, a Create Purchase Order Confirmation operation 1124, included in an Ordering In interface 1125, may transfer the update to the Purchase Order Confirmation business object 1128 by using a Create Purchase Order inbound process agent 1126. The Purchase Order Confirmation business object 1128 is a confirmation from an external supplier to the request of a purchaser to deliver a specified quantity of material, or perform a specified service, at a specified price within a specified time.

FIG. 12 is an illustration 1200 of process component interaction through a mapping model element 1214 (or “mapper”). As discussed above, if message formats between two process component operations do not match, the message can be transformed by a mapper on its way from the outbound process agent to the inbound process agent. For example, output process agent 1216 associated with process component 1202 can send a message 1210 to inbound process agent 1217 in process component 1204 by way of operation 1218 in interface 1206. If the message format associated with operation 1218 does not match that of operation 1220, a transformation of the message from its original format to a format compatible with operation 1220 can be described by a mapper 1214 interposed between the two process agents. The mapper 1214 generates a new message 1212 based on the original message 1210, where the new message has a format that is compatible with operation 1220.

The subject matter described in this specification and all of the functional operations described in this specification can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structural means disclosed in this specification and structural equivalents thereof, or in combinations of them. The subject matter described in this specification can be implemented as one or more computer program products, i.e., one or more computer programs tangibly embodied in an information carrier, e.g., in a machine-readable storage device or in a propagated signal, for execution by, or to control the operation of, data processing apparatus, e.g., a programmable processor, a computer, or multiple computers. A computer program (also known as a program, software, software application, or code) can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file. A program can be stored in a portion of a file that holds other programs or data, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub-programs, or portions of code). A computer program can be deployed to be executed on one computer or on multiple computers at one site or distributed across multiple sites and interconnected by a communication network.

The processes and logic flows described in this specification can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit).

Processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto-optical disks, or optical disks. Information carriers suitable for embodying computer program instructions and data include all forms of non-volatile memory, including by way of example semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.

To provide for interaction with a user, the subject matter described in this specification can be implemented on a computer having a display device, e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor, for displaying information to the user and a keyboard and a pointing device, e.g., a mouse or a trackball, by which the user can provide input to the computer. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback, e.g., visual feedback, auditory feedback, or tactile feedback; and input from the user can be received in any form, including acoustic, speech, or tactile input.

The subject matter described in this specification can be implemented in a computing system that includes a back-end component (e.g., a data server), a middleware component (e.g., an application server), or a front-end component (e.g., a client computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the subject matter described herein), or any combination of such back-end, middleware, and front-end components. The components of the system can be interconnected by any form or medium of digital data communication, e.g., a communication network. Examples of communication networks include a local area network (“LAN”) and a wide area network (“WAN”), e.g., the Internet.

The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other.

The subject matter has been described in terms of particular variations, but other variations can be implemented and are within the scope of the following claims. For example, the actions recited in the claims can be performed in a different order and still achieve desirable results. As one example, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In certain implementations, multitasking and parallel processing may be advantageous. Other variations are within the scope of the following claims. 

1. A software modeling system comprising at least one memory storing a software modeling tool and at least one processor executing the software modeling tool to perform operations to define interactions between at least two process components, the operations comprising: processing at least one input defining, for each process component, at least one inbound operation initiated by other process components to read or modify data encapsulated in a business object solely associated with the process component; and processing at least one input defining, for each process component, at least one outbound operation to read or modify data encapsulated in a business object solely associated with another process component; wherein each of the process components is entirely included in exactly one deployment unit, each deployment unit corresponding to a hardware platform on which a process component is deployed associated with a deployment unit, each of the process components characterizes independently operable and context-independent software implementing a respective and distinct process, and each of the process components defines a respective at least one service interface for communicating and interacting with other process components, and all communication and interaction between process components takes place through the respective interfaces of the process components, each service interface comprising at least one service operation, and each service operation belonging to exactly one process component and comprising a separately-callable function, wherein interaction between process components in different deployment units takes place through messages passed through the respective service interfaces of the process components in the different deployment units, and interaction between process components in a same deployment unit takes place through business objects accessible to the process components in the same deployment unit.
 2. The system of claim 1, wherein the at least one outbound operation is called after the business object associated with the outbound operation is read or modified.
 3. The system of claim 2, wherein the at least one outbound operation sends a message after it is called.
 4. The system of claim 1, wherein at least one of the inbound operations is a synchronous operation operable to receive a synchronous message generated by an external synchronous outbound operation defined by the other process component.
 5. The system of claim 1, wherein at least one of the outbound operations is an asynchronous outbound operation operable to generate an asynchronous message for receipt by an asynchronous inbound operation defined by the other process component.
 6. The system of claim 1, the operations further comprising: defining, for each process component, at least one inbound process agent characterizing the at least one inbound operation.
 7. The system of claim 6, wherein at least one inbound process agent specifies a response to each of at least two inbound operations.
 8. The system of claim 1, the operations further comprising: defining at least one inbound interface comprising at least two inbound operations.
 9. The system of claim 1, the operations further comprising: defining, for each process component, at least one outbound process agent characterizing the at least one outbound operation.
 10. The system of claim 1, wherein at least one outbound process agent specifies a trigger to each of at least two outbound operations.
 11. The system of claim 1, the operations further comprising: defining at least one outbound interface comprising at least two outbound operations.
 12. The system of claim 1, wherein each inbound operation and each outbound operation are solely associated with one of the process components.
 13. The system of claim 1, wherein at least one of the inbound operations is operable to receive a message of a first type and convert it into a message of a second type.
 14. The system of claim 1, the operations further comprising: processing at least one input defining types of messages to transfer between different deployment units.
 15. The system of claim 1, wherein at least two process components within a single deployment unit communicate without messages.
 16. Apparatus comprising at least one non-transitory, computer-readable storage medium storing instructions operable, when executed by at least one processor, to perform operations to define interactions between at least two process components, the operations comprising: processing at least one input defining, for each process component at least one inbound operation initiated by other process components to read or modify data encapsulated in a business object solely associated with the process component; and processing at least one input defining, for each process component, at least one outbound operation, to read or modify data encapsulated in a business object solely associated with another process component; wherein each of the process components is entirely included in exactly one deployment unit, each deployment unit corresponding to a hardware platform on which a process component is deployed associated with a deployment unit, each of the process components characterizes independently operable and context-independent software implementing a respective and distinct process, and each of the process components defining a respective at least one service interface for communicating and interacting with other process components, and all communication and interaction between process components taking place through the respective interfaces of the process components, each service interface comprising at least one service operation, and each service operation belonging to exactly one process component and comprising a separately-callable function, wherein interaction between process components in different deployment units takes place through messages passed through the respective service interfaces of the process components in the different deployment units, and interaction between process components in a same deployment unit takes place through messages passed between the process components in the same deployment unit.
 17. The apparatus of claim 16, the operations further comprising processing at least one input defining, for each process component, at least one business object; wherein the inbound operations are operable to start an execution of a step requested in an inbound message originating from the other process component by reading or modifying its respective business object; and wherein the outbound operations are called after their respective business object is modified or read and is operable to trigger a generation of an outgoing message requesting a step reading or modifying a business object associated with the other process component.
 18. A computer-implemented method of defining interactions between at least two process components in a software modeling environment, the method comprising the following steps performed on at least one processor: processing at least one input defining, for each process component, at least one inbound operation initiated by other process components to read or modify data encapsulated in a business object solely associated with the process component; and processing at least one input defining, for each process component, at least one outbound operation to read or modify data encapsulated in a business object solely associated with another process component; wherein each of the process components is entirely included in exactly one deployment unit, each deployment unit corresponding to a hardware platform on which a process component is deployed associated with a deployment unit, each of the process components characterizes independently operable and context-independent software implementing a respective and distinct process, and each of the process components defines a respective at least one service interface for communicating and interacting with other process components, and all communication and interaction between process components takes place through the respective interfaces of the process components, each service interface comprising at least one service operation, and each service operation belonging to exactly one process component and comprising a separately-callable function, wherein interaction between process components in different deployment units takes place through messages passed through the respective service interfaces of the process components in the different deployment units, and interaction between process components in a same deployment unit takes place through at least one of business objects accessible to the process components in the same deployment unit or messages passed between the process components in the same deployment unit.
 19. A method as in claim 18, further comprising: defining types of messages to transfer between different deployment units.
 20. A method as in claim 18, further comprising: processing at least one input defining, for each process component, a plurality of process agents, each process agent being either an inbound process agent or an outbound process agent, an inbound process agent being operable to receive a message from an inbound operation, an outbound process agent being operable to cause an outbound operation to send a message; and processing at least one input defining interactions between at least one inbound process agent of a first process component and at least one outbound process agent of a second process component; and processing at least one input defining interactions between at least one inbound process agent of the second process component and at least one outbound process agent of the first process component. 